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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* (c) Rezo Zero / Ambroise Maupate |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace League\CommonMark\Extension\Footnote\Event; |
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use League\CommonMark\Event\DocumentParsedEvent; |
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use League\CommonMark\Extension\Footnote\Node\FootnoteRef; |
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use League\CommonMark\Reference\Reference; |
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final class NumberFootnotesListener |
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{ |
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public function onDocumentParsed(DocumentParsedEvent $event): void |
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{ |
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$document = $event->getDocument(); |
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$walker = $document->walker(); |
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$nextCounter = 1; |
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$usedLabels = []; |
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$usedCounters = []; |
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while ($event = $walker->next()) { |
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if (!$event->isEntering()) { |
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continue; |
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} |
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$node = $event->getNode(); |
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if (!$node instanceof FootnoteRef) { |
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continue; |
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} |
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$existingReference = $node->getReference(); |
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$label = $existingReference->getLabel(); |
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$counter = $nextCounter; |
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$canIncrementCounter = true; |
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if (\array_key_exists($label, $usedLabels)) { |
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/* |
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* Reference is used again, we need to point |
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* to the same footnote. But with a different ID |
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*/ |
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$counter = $usedCounters[$label]; |
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$label = $label . '__' . ++$usedLabels[$label]; |
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$canIncrementCounter = false; |
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} |
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// rewrite reference title to use a numeric link |
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$newReference = new Reference( |
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$label, |
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$existingReference->getDestination(), |
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(string) $counter |
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); |
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// Override reference with numeric link |
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$node->setReference($newReference); |
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$document->getReferenceMap()->addReference($newReference); |
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/* |
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* Store created references in document for |
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* creating FootnoteBackrefs |
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*/ |
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if (false === $document->getData($existingReference->getDestination(), false)) { |
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$document->data[$existingReference->getDestination()] = []; |
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} |
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$document->data[$existingReference->getDestination()][] = $newReference; |
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$usedLabels[$label] = 1; |
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$usedCounters[$label] = $nextCounter; |
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if ($canIncrementCounter) { |
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$nextCounter++; |
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} |
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} |
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} |
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} |
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thephpleague /
commonmark
